Drain box for papermaking machines



March 3,1942. E, E, BERRY -2,274 ,654

DRAIN BOX FORPAPERMAKING MACHINE;

Original Filed March 27,-1936 s sheets-sheet 1 EARL EBERRY Q15 March 3,1942. E. E. BERRY 2,274,654

DRAIN BOX FOR PAPERMAKING MACHINES Original Filed March 27, 1956 Y 3Sheets- Sheet 2 March 3, 1942. E. E. BERRY DRAIN BOX FOR PAPERMAKINGMACHINES Original Filed March 27, 1936 3 Sheets-Sheet 3 EARL E. BERRY wM. x 0 v 3 4 3 s w w 0 3 4 4 6 k t W \A \Nww u 9 3. i 3 M 4 KZ L 3 m w w3 4 V M Emerge Man l we Y Earl EifBerrsg'BeloitrWis,assignortoBeloit'lron e Works;Beloitswist atcorpnrationzvotwiscpnsin origamiapplet-tam Mama-e211; 193e,; sex-n11 uo-,.. 71,109.Divided;amtthisapplicationeMay"3;

I93fl, Serial No;:140;2a9- I V (cl; 92-9-51) V drain boxes" fordewaterin gf a 's i m;

I This invention relate s te drairi bole structure for Eourdriniertype.vpaper making machines;

More: specifically this inventionrelatestodrain;

boxes? for mountingunden the upper: run of Eourdrinieri wires in paper:making machines: to

regulate drainage ofi liquid througmthe- Wires andto supportthewires...

, applicationis avdivisioniof my? copending' application. entitIedz;Pressure hndgvacuum forming paper. making: machinePQSeLi'aI: No."

71,,109 filed. L March. 27; 1936;. which has matured intoPatentllo-23021890; a r I Attempts to; efiect web:.formation-on'Fourdrine ier'wires of. shortlengths; by forcing thedraim age of white water: from:the paperstock on. the:

wires have; notlbeeriw entirely: satisfactory because;

the suction boxes; and: draining} devices placed. 7 beneath-the forming.WiIBS havesubj'ected; the:

wires to high frictional wear. as' they passz over: the devices. The;drain boxes: of this: invention carry atthe tops. thereof bearingsupp'orts for small. diameter table rolls These table rolls aresupported in. the bearings throughout substanbearing-sleeves acrossktheopen" tops thereof for rotatably carryingwsmall diameter table rolls toa support the Wirescreenof. such machines as they- I pass: overthe drainboxes. V

ISL-further object-10f this? invention is. to provide drain'boxes withseparate chambers thereinv and, to con-trolethe yacuum in each chamberand the drainage:- of iliiqiuid from each chamber;

A turther-objectot Jthi sinventi'on' is to-provide v improvedi'white'water draining devices for paper 7 making? machines that-can: becarefully regulated" V making machine equippectwith drain: boxes oftially'their entireaiengthsaand'by virtue oftheir:

small diameters; canv be-mount'edii'n close relation transversely of:the upper" rimiflfl the forming. wire. Thiszmakes possible asmorecontinuous support for the-wire without.wearing out the: bottomiof the:wire. by friction". Forceddrainage of; white water through the wire isobtainedi'byvcontrolled suction in thev dr'ain boxes-without causing africtional. dragon the under side of thewireas,occurrecfiheretofore,

The draineboxestotithisdnventionwili be spe- 7 cifically hereinafter:describedin connections-with. -v

a; pressure. and'vacuum forming paper making;

machine forming-the subject matter ofBatent No;

the, drain: devices. of." thisinvention are adapted for use on othertypes; of dewatering; machines;

The drain devices of thisinvention: are. prefv erably divided mwepluralityof; chambers ex-..---

, 2,'2c2,s90;. ltshould b'evunderstood,however, that tendingtransverselyfl under. the uppen run:- of; the

forming; wire;v Suction from within each; of: the

v chambers: can besebarately controlledianid'rain age ofl-w-hite. water:from. the be separately; controlled. I

The drain boxes; are slidably mounted on tracks extending through, theloopof" the forming wire chambers can; also of the paper making;machineandca-n-be: con'- tion. Separate pedestals or supports cambedis:

veni'ently moved; and out oi operating: 1395i?" posedunder the;draimboxcs: for holdingthesame: V

in: operating positions.

It is-thenzan object of; thisv invention to provide "The: drain boxes toeffectfiber formation: on the wire as: desired.- iotherand-,iuitherfobjectsof thisinvention will become: apparentito" thoseskilledin the art from the, followingdeta-iled' description of r theannexed sheets of drawings, which disclose a? preferredembodimentof theinvention. On thexdrawingsr s Figurevl is a-sideelevationali view of'a.paper.

this reinvention. Y

Figure: 2% is an enlarged Figure 35 1s: a. fragmentary'verticalrcross-s'ec-- tional; view; taken substantially along" the line.

Figure 4 15a broken vertical cross-sectional view taken.substantiallyalong the line? Asshownon 'therdrawing'si 1 Figure 1,]the reference.numeral l0? desige' I natesfthe-forming wire oi the paper machine. Thewire. 10' is: entrained between a breast rol-l: H and a,v.couch:-ro11132'." A tensioning roll l3 canbe mounted within the loop ofv the wirealong v thef under rnni thereof 'for'regulating the tension. ofthe wire.I l'4= and'zf 15. of this invention are: mounted under the upperlrun ofthe forming wire- Ht and carry", table roll structure, as will. be 7more fully'fhereinafter described, for supporting the: forming wirealong its upper; run..

A deckle strap; [6* is mounted along. theupper run: of the formingzwire"M at each sides-=thereot and: is trained around the usual deckle.pulleys" l1: and 18. As will be hereinafter more" fully described eachdeckle-i'strap it rests alongKits;

bottom; run, partly on the edge of the forming: wire; lfl andpartly onthe tablerolls/carried; by I the-drain boxes to: seallthe' chamber-slotthedrairr boxes and; to; prevent-leakage OfLStOCk over thesixties-ofatheformingwlre;v I If desired a dandyrollor'waterinarkingroll fragmentary vertical" cross=sectionai viewtakensubstantiallyalong v thelin'eII&II:ofIFigur.eI; I v

-chamber Gil located thereabovc. Thechamber 59 has atleast onepassageway or opening 6| communicating with each' chamber 40 of thebox-I 4. The manifold chamber 59 can be evacuated by a vacuum pump (notshown) to draw airfrom the chambers 40 through the opening Bl.Thechambers 40 are thus suction boxes on "the under side of the formingwire l since air pulled through the manifold 59 to evacuate thechambers. must be drawn/through theforming wire; l0 between the tablerolls 52 along the spaces provided between the bars.

The amount of air evacuated from each chamber can be positivelycontrolled by a stopper or plunger 62 provided forgeach passageway oropening 6|. The stopper 62is threaded through a boss plug 63 which in.turn is threaded into the box defining themanifold chamber 59. stopper62 can be manually set at any desired .distance from a seat 65 at themouth of each passageway Bl by a manual turning of the head 7 66 on theend of the stopper. 7

The slots 44 formed in each of the bars 43 each of the partition walls39 and the end frame openings or slots 5| of the bearing sleeves forforming a lubricating film between the table It will be rolls 52 and thebearing sleeves- 50. noted from Figure 3 that each slot 44 has aseparate passageway 61 communicating with the manifold chamber 60. Inthis manner water is equally distributed to each of the slots-44 for"lubricating each of .the table rolls 52.

The flow of water-into the bearing sleeve 50 can be controlled byhydraulic pressure of thewater in.the manifold chamber to overbalancethe weight of the table rolls'and flow out of the bearing sleeves intothe chambers 40 of the drain box alpng'withthe whitewater drainedthrough the. forming wire. water pressure can be adjusted to-merelysupply a'film of water on each bearing sleeve 53 without overflowing thewater out of the sleeve.

The table rolls are/thus hydraulically lubri- Alternatively the catedandbalanced as desired in their hearing sleeves. a Each deckle strap l6,as shown in Figure 2,

rests partly on the forming wire 10 and partly- Each deckle strap .is

on the table rolls 52. guided between a plate 68 secured'on the side ofthe box and an inner plate 69' which may extendalong thefull length ofthe upper run of 'the forming wire. Theidecklestrap thereby seals theedge of the forming .wire' and the aqueous suspension of stock depositedon the; wire can only'be drained through'this wire under the'controlleddrainage effected by the amount of vacuum in each compartment 40' of Ythe drain boxes.

The white water drained into the drain boxes is collected in the sump 33thereof; and pumped therefrom by means of the usual white waterpumpinotshownL- A hydrostatic head of white water, however, can bemaintained in each compartment 40, of the drain boxes by regulating thedrainage from these .compartments.- This;

7 able in said slots for' regulating the size of. the openings betweenthe chambers'definedby said drainage is controlled by spacing of theslides 42 from the bottom of the pans of the boxes.

Each compartment 40ican thus be sealed from the remaining compartmentsand the amount of suction under the forming wire'definitely controlledby the suction pump'operating through the manifold chamber 59and bythe-position of the stopper 62 in respect to the passageway 6| 7communicating with this compartment.

As best sholwn in Figure ifsome of the partition walls 39 arelnotprovided with slides. These walls are spaced away from the'forming areaof the wire where it is' desired to remove any white water from thesheet formed on the wire.

As a resultit is desired to have an increased vacuum at these points,created by the white j water pump and the'vacuum'pump. a

If desired, mechanisms maybe provided for oscillating the table rollslongitudinally toprevent any grooving ofv the 'rolls by dirt which mightenter into theibearingjsleeve. However,

this dirt can be readily removed by an over: balanced hydraulic pressureflowing the lubrieating water out of thebearing sleeve to carry thedirtther'ewith.

From the above descriptions .i't shouldlbeun derstood that thedrainboxes of this invention carry table roll structurewhich supports theupper runof the forming wire in a more continuous manner than heretoforeprovided. As a result, higher vacuum can be maintained'unde'rf I thewire without the frictional wear of the under side of the wireheretofore encountered. Variable degrees of suction can be maintainedunder advancing increments of the wire and. the. web formation on thewire is thus nicely regulated. I am aware that many changes may be madeand numerous details of construction may be. varied through a widerange'without departing from the principles of this invention, andI,Itherefore, do not purposelimiting the patent granted hereon(otherwise than necessitated by the'prior 7 art. 1

I claim as my invention: 4 v

1. A white water drain box for paper machines I adapted for mountingwithin the. loop, of the paper machine forming wire comprising an opentopped boxhaving a pluralityof :partition Walls 4 extending thereacrossto define chambers within the box, said walls terminatingabove thebottom of the box, slides cooperating withtheibottom portion of at leastsome of the partition walls to regulate the size. of the open spacebeneath said walls; and meansoperablefrom outside: of

thebox for raising and lowering the slides.

2. A device for controllingdrainage from paper machine forming wirescomprising .an open topped box adapted for mounting within the loop ofsaid forming wire and having'a bottom in-I eluding a sloping portion anda sump'portion, a.

plurality of transversely extending vertical partition walls in said boxdefining opened top chambers therein, saidwalls terminating above the.

bottom of the box 1 with th walls above the slopingportion havingslotted ends, plates slidwalls, and means for sliding said slots.

3. Adrain device adapted'tobe mounted withplates in said in the loop ofthe forming wire of a paper ma-' chine comprising a box'for receivingwhite water i through the formingwire of said machine, said box having aplurality of yertical partition walls above'the bottom. thereof definingintercommuni-' eating chambers therein; a white water collecting sump inthe bottomof said box, andgates cooperating with said' walls 'forcontrolling drainage from said chambers into said sump. 4;. A whitewater drain, device for a Fourdrinier paper machine. comprising a ,boxadapted;

to, bemounted' withinlthe. loop of; the forming 5;

wire oi the machine, vertical, partition walls in said box terminatingin spaced relation from the bottom of the box, said walls havingvertically slotted bottom portions, plates slida'ble insaid slottedportions, and screws extending through the bottom of the box for raisingand lowering said plates, 7 V

5. A white water drain device for a Fourdrinier paper machinecomprisinga box adapted to be mountedwithin the looped formingq'wire ,ofsaid machine'unde r the upper run thereof, a bottom for said boxihavinga downwardly sloping portion and a sump portion below the bottom of saidsloping portion, vertical partition walls in said box terminating abovethe bottom thereof, the walls above the sloping bottom por-.' tion ofthe box having vertical slots in the ends thereof, plates slidable insaid slots, and lift screws extending through the sloping bottomportionfor raising and lowering said plates to control the rate ofdrainage into the sump from the chambers defined by the walls. I v

6. A drain device and filter band support for dewatering machinescomprising a box adapted for mounting within the loopof the filter band,a plurality of partition walls in said box defin bers in the box nearthe tops thereofwfor'receiving air therefrom, spaced bats in the top:por-" tions. of the chambers extending transversely across the boxparallel with the partition walls, said bars having slots thereinextending across the tops of said chambers, elongated segmental 4Qcylindrical bearing sleeves secured .to the tops of the bars incommunication with the slots therein, table rolls rotatably mounted insaid bearing sleeves for engaging the underside of the filter band tosupport the band, a secondduct extending alongside of the box incommunication with each .of the slots in said bars for supplyingalubricant to the bearing sleeves, and means carried by the box forrotating said rolls.

7. In a' drain device 'for dewatering-Inachines including a loopedliquid pervious filter band, an open topped boxadapted formounting-within the loop of said band, rods extending longitudinallyacross said box near the top thereof, bushings on said rods havingupturned arms in spaced rela-. tion, transverse bars removablymountedbetween said arms, said bars extending in spaced parallelrelation across the topof the boX-therebydefi r ing drain'openingstherebetween, said barshaving longitudinal. slots extending across thetops thereof, a wall of "said boxhaving ape'rtures in t communicationwithslots, a ductv carried by said box for supplying water throughsaidapertures to the slots,,bearingxsleeves secured to the tops of thereinand table, rollers rotatablynmountedfin said sleeves. r V

8. In a drain box'for dewatering machines a in the'box, seats formedon'the duct side of said apertures, valves in. said ducts adapted tofit75 9..A drain device adaptedto be, moved as; a:

., unitinto; theloopof a Fou-rdri-nier.formingwire between; thebreastrolland; conchjoll-ends of the wire for supporting the uppfilfr'unofthe wire and for jcontrolling drainage-through the wire comprising anoped-topped box having; a bottom sloping downwardlytoward the couch rollend of the forming wire, said boxhaving; a, drain outlet communicatingwith the lower-rnost portionp of the bottom, spaced transverse.partition walls; I in said box extending downwardly from the top ofthebox to define aplurality: of open topped chambers in theb'ox, said;chambers being in communication with each other at the]. bottom of I thebox, gates for restrictihgv theamount of; coin-. munication betweenthechambers, means operable from outside of the boxior' actuating saidgates, spaced parallel bars between the partition wallsextendingtransversely-across the top DOT-.1

tion of the box, an elongated bearing support" extending along the topofeach bar-and each pertition'wall, and small diametertable rolls rotatably mounted in saidbearing Supports for carrying the forming wire.

controlling drainage through "the wire comprise ing an open topped boxhaving a, drainqoutlet communicating with the bottom portion thereof).

spaced transverse partition walls in said box extending downwardlyfromthe-top of thebox; to

provide a plurality of open topped chambersin.

the box, said chambers being in communication=- with'each other at thebottomof the boxggates for restricting theajmount of 'communication between the chambers, means operable from,,out-.

side of the box for actuating; saidgdtesgspaced parallel bars in the topportion of the box dis-n posed between the p'artitionw'a-lls andextending transversely across the box, thetopsof said bars and the topsof said partitionwalls providing el n ated bearing housingsextendingacross thetop of the box, and smallr diameter table rolls. rotatablymounted in said bearing: housings, for, carrying the forming z wirerwhereby drain e, through thewire into the .chambers is accommo-. datedbetween-the spaced bars and. partition; walls and the amount or saiddrainage can bev controlled by manipulation of the gates to providevariable drainage conditions alongthe length of the box.

l1'.I n a Fourdrinier paper, making-machine having" a loopedformingwi-re, a drain box-- mounted within the loopof the wire andextend-v ing beyond the sides-of the, wire, elongated. open, toppedbearing sleeves extending transversely. across the top of: the box inclosely spaced par-1 allel relation} an elongated stationary plate I onthe side of the-boxextending;abovethe bear-.

ing sleeves, small diameten-table rollers. rotatablyv mounted in saidsleeves andextending through said bars .adaptedto receive water rrom theslots said plate, said tablerollers, supporting the wire along theupper-run thereof,- driving means. gaging the extending ends of thetable rollers for-driving therollers and wire, a decklelstrapiat;the-1edgeof the wire along" the upperrun.

ther I, said -deckle strap projecting-beyond the wire edge 'to abut theplate, the projecting l per:

f l'tiOn of the strap being directlycarried *by the table; rollers, andan elongated; stationary guide plate along the inner side of; the decklestrap. to, hold'th'e 'decklestrapagainst the plate whereby;

ried in the top of said box and extending transversely under the upperrun of the wire for supporting the wire, said table rollers projectingbeyond an edge of the wire, an elongated stationary 'wall memberextending along the length of said box above the tops of the tabletrollers in spaced I relation from the edge of the Wire, a deckle strapabutting said Wall member and carried on a portion of the table rollersprojecting beyond the wire, and said deckle strap having a portionthereof extending over the edge of the wire where-- by the deckle strapis directly carried at closely spaced intervals on rotatable supportsand cooperates with the wall member to prevent leakage of air around theedge of the wire into the suction box.

1 EARL E7 BERRY.

